<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../js/vue.js"></script>
</head>
<body>
    <div id="root">
        姓：<input type="text" v-model:value="firstName"><br><br>
        名：<input type="text" v-model="lastName"><br><br>

        <!-- 插值语法实现 -->
        <!-- 全名：<span>{{firstName}}-{{lastName}}</span> -->

        <!-- methods实现 -->
        全名：<span>{{fullName()}}</span>
    </div>
</body>
<script>
    Vue.config.productionTip = false;
    const vm = new Vue({
        el:"#root",
        data:{
            firstName:"张",
            lastName:"三"
        },
        methods:{
            fullName(){
                // this指向这个Vue实例对象
                return this.firstName + "-" + this.lastName;
            }
        }
    });
</script>
</html>